turns
POWER_SUPPLY_STATUS_UNKNOWN for any battery state it doesn't already
handle explicitly.  There doesn't seem to be any status enum value
defined that makes more sense than 'unknown' for a battery at a
critical charge level.

Signed-off-by: Roland Dreier <roland@digitalvampire.org>
Acked-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <lenb@t61.(none)>
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